Whip-roll for looms



(No Model.)

T. H. SPEAKMAN, 0. W. GLEASON 8v H. PETERSON.

' WHIP ROLL FOR LOOMS.

' Patented Nov.- 19, 1895.

M. Puuromdwwmnmu 1m U ITED STATES PATENT OFFICE.

THOMAS HENRY SPEAKMAN, OSCAR WILLIAM GLEASON, AND HENRY PETERSON, OFBRISTOL, RHODE ISLAND, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE MASONMACHINE WORKS, OF TAUNTON,

MASSACHUSETTS.

WHIP-ROLL FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 550,201, dated November19, 1 895. Application filed February 21, 1895. Serial No. 539,171. (Nomodel.)

'To aZZ whom it may concern:

Be itknown that We,THOMAS HENRY SPEAK- MAN, OSCAR WILLIAM GLEAsoN, andHENRY PETERSON, of Bristol, in the countyof Bristol and State of RhodeIsland, have invented certain new and useful Improvements in VVhip-Rollsfor Looms, of which the following is a full, clear, and exactdescription, reference being hadto the accompanying drawings, formingpart of this specification.

This invention has reference to an improvement in the whip-roll orwhip-bar of looms used to support the warp as it passes from thewarp-roll to the harnesses.

Whip rolls or bars are usually supported at the rear of the loom and areheld in the normal position by a spring acting on a lever, which issecured to the shaft of the whip-roll.

The surface of the whip-roll or the bar on which the warp is supportedis offset on one side of the axis of the shaft or the bearings of thewhip-roll, so that the whip-roll forms a long crank. The whip-roll isheld in the normal position by a lever the longer arm of which bears ona spring, which tends to raise the Whip-roll and exerts a yieldingtension strain on the warp and gives way to the strain when the warp issprung to form a shed.

The object of this inventionis to increase the capacity of the whip-rollto yield to the strain on the warp, so that when a shuttle from anycause stops in the shed the whiproll will yield to the strain andthereby prevent the smashes which happen when the warp is sprung whilethe shuttle is between the warp.

The invention consists in the peculiar and novel connection of ,thewhip-roll with the controlling-lever and the novel construction of thewhip roll, more fully set forth hereinafter.

Figure 1 represents a view of portions of a loom and the improvedwhip-roll in'position, the direction of the movement of the Warp beingindicated by the arrow ca Fig. 2 represents a plan view of the improvedwhip-roll and its lever, showing one means of yieldingly connecting thesame. Fig. 3 represents an enlarged View of parts of the whip-roll andits lever, partly in section. Figs. 4 and 5 represent details ofconstruction, showing the clutch-plates of the roll and the lever.

Similar numbers of reference designate corresponding parts throughout.

In the drawings, 6 indicates one of the side frames of a loom, and 7 isa bracket-arm, in which one end of the whip-roll is j ournaled, it beingunderstood that the opposite end of the whip-roll or its shaft issimilarly journaled. The whip-roll in the present instance consists ofthe shafts 8 and 9 in axial alignment and the main portion 10, bent outof said alignment and furnished intermediate the bent portions with thefriction leverage-plate 11, having the rounded lip 12, over which thewarp passes from the warp-beam to the harnesses.

On the shaft 8 of the whip-roll is a clutchplate 13, extending from thecenter of which is a short'shaft 14, having a screw-threaded end. Onthis shaft 14 is journaled the lever 15, having a clutch-plate 16, whichengages with the clutch-plate 13 on the Whip-roll. Ex-

tending from the lever 15 are the counterweight arm 17 and the stop-arm18, which prevent the undue rearward rotation of the whip-roll whenrelieved from the drag of the warp. The free end of the lever 15 ispivoted to a rod 19, having a collar 20, and movable at its lowerportion through the guide 21, secured to the loom-frame, the spring 22,mounted on this rod between the collar 20 and the guide 21, tending toexert an upward pressure on the rod and on the free end of the lever 15.

. The clutch-plate 16 is held in contact with the'clutch-plate 13 by theyielding pressure of the spring 23, mounted on the shaft 14: and heldagainst the back of the clutch-plate 16 by the nuts 24, adjustable onsaid shaft to increase or diminish the pressure exerted by the spring 23to hold the clutch-plates together.

Under normal conditions the warp passes over the curved edge 12 of thewhip-roll plate 11, which exertsa s light tension on the warp nearlysufficient to overcome the'counterbalancing effect of the offset portion10 of the whip-roll. During the opening of the shed the frictionalcontact between the warp and the curved edge 12 of the whip-roll isincreased by the sudden taking up of the warp in spreading to form theshed, and the spring 22 allows the free end of the lever 15 to movedownward as the edge 12 of the whip-roll is drawn forward, thusrelieving the tension on the warp. The filling-thread is received by theopen shed and in due process another shed is opened with similar actionon the part of the whip-roll.

\Vhen in place of closing the shed on a fine filling-thread and openinganother shedwhich takes up the warp over the whip-roll 3 to but a smallextent-a shuttle becomes caught in the shed which closes thereon, it isobvious that many times the amount of warp must be taken up by the greatdiameter of the shuttle or a warp smash must occur. \Vhen this is thecase, the relief aiforded by the yielding of the spring 22 is notsuflicient to so reduce the friction of the plate of the whip-roll 011the warp that it (the warp) may readily pass. To provide for accidentsof this nature is the province of the yielding connection furnished bythe clutch-plates 13 and 16 with the tension-spring and adjustmenttherefor. It will be noticed that by the use of these and by theconstruction of the whiproll this roll may be rotated in the directionof the moving warps until the threads are supported below the axialcenter of the whiproll, where they are relieved from the take up causedby the offset of the shaft and its plate 11.

It is evident that the form of the e1utchplates maybe varied to suit theuses to which the whip-roll is subjected.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- The combination, in a 100111, with a whiprolljournaled in bearings and havin the clutch-plate 13 secured to one endthereof and the shaft 14. extending from the axis of the clutch-plate,of the lever 15 journaled on the shaft let and having the clutch-plate16 in engagement with the clutch-plate 13, the spring 23 011 the shaft14, the nuts 24: for ad j usting the tension of the spring on theclutchplate 16, a rod pivoted to the free end of the lever 15, and aspring for yieldinglysupporting the same.

In witness whereof we have hereunto set our hands.

THOMAS HENRY SPEAKMAN. OSCAR XVILLIAM GLEASON. HENRY PETERSON.

\Vitnesses:

JOSEPH A. MILLER, J12, M. F. BLIGH.

